What is LED driver?

author: Sona

1970-01-01

The LED driver, light-emitting diode, is a kind of power converter that converts the power into a specific voltage and current to drive the LED to emit light. It provides the required current and voltage to keep the driver running properly. It has other names like LED drive power supply, LED light driver, LED driver circuit, etc.

Usually, It has a round shape (Suncom LVC, LAG, LAS series), a strip shape, a rectangle shape (Suncom HVC, SCP, HVE and other series), a metal shell, or a plastic shell, the input of the LED driver includes high-voltage power frequency AC（ie mains) , low-voltage DC, high-voltage DC, low-voltage high-frequency AC, etc. LED driver can be divided into constant current, voltage regulation, pulse drive and AC drive according to the drive mode.

It has high reliability and has functions such as overcurrent protection and open circuit protection. For example, improving the power factor in the LED driver can improve the power consumption efficiency of the equipment, reduce the ineffective loss, and improve the utilization efficiency.

Electrical isolation, the LED driver is provided by the AC mains grid with a high voltage, but the LEDs work at a lower safe voltage, so electrical isolation is required between them to meet safety regulations and avoid electric shock accidents.

LED driver has many kinds of types:

1. According to the output method, it can be divided into constant current and constant voltage LED driver.

2. According to the installation position, it has external and internal LED driver.

3. According to the IP rating, it can be divided into waterproof and not waterproof LED driver.

4. According to the whether there is switching power supply transformer, it can be divided into isolated and non-isolated LED driver.

5. According to the rated power segments, LED driver has 12W, 20W, 30W, 50W, 70W, 100W, etc.

6. According to the function, there are dimmable type and regular type, the common dimming are triac dimming, DALI, 0/1-10V dimming, switch press dimming.

Common signs of LED drivers

Q&A for providing drivers solution